trouble with the solar yield cos is they have these "sponsors" But those guys are just PV manufacturers who are looking to boost their margins by installing PV and then charging their yieldco top dollar for those projects. It's an obvious conflict of interest.
I've got some PEGI, which is mostly wind power that has less of this conflict of interest.
However, I'd much prefer to simply invest directly in a solar project via a notes (lending club) sort of mechanism. Allow me to sell the notes on an aftermarket if I suddenly need money for another reason.